Emulator of the 8-bit computers Sharp MZ-800 / MZ-700
An advanced network simulator to design and configure virtual networks
Versatile Commodore Emulator
Run Windows applications on Linux, BSD, Solaris, and Mac OS X
C64/Amiga emulator with PAL shader and runAhead
a multiplatform, full-featured GameBoy classic emulator
Z80 shared library including some nice test-projects
Emulator of Timex FDD3000
Binary Modular DataFlow Machine (BMDFM)